package com.lagou.dao.Impl.Impl;

import com.lagou.dao.Impl.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class CourDaoImpl implements CourseDao {

    //定义一个查询课程列表信息的抽象方法
    @Override
    public List<Course> findCourseList() {

        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner (DruidUtils.getDataSource ());
            //2.编写sql,判断是否删除，取出is_del = 0的数据，未删除的数据
            String sql = "SELECT \n" +
                    "\tid,\n" +
                    "\tcourse_name,\n" +
                    "\tprice,\n" +
                    "\tsort_num,\n" +
                    "\tSTATUS\n" +
                    "FROM course WHERE is_del = ?;";

            //3.取出操作
            List<Course> courseList = qr.query (sql, new BeanListHandler<Course> (Course.class), 0);
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace ();
            return null;
        }
    }

    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {

        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner (DruidUtils.getDataSource ());

            //2.编写sql，当前的查询为多条件不定项查询
            //2.1创建StringBuffer对象,将sql字符串 添加进缓冲区
            StringBuilder sb = new StringBuilder ("SELECT id,course_name,price,sort_num,STATUS FROM course WHERE 1=1 AND is_del = ? ");


            //2.2创建list集合，保存参数
            List<Object> list = new ArrayList<> ();
            list.add (0);

            //2.3判断传入的参数是否为空
            if (courseName != null && courseName != "") {
                sb.append ("AND course_name LIKE ?");
                //like查询需要拼接%
                courseName = "%" + courseName + "%";
                list.add (courseName);
            }

            if (status != null && status != "") {
                sb.append ("AND STATUS = ?");
                //将status转换为int
                int i = Integer.parseInt (status);
                list.add (i);
            }

            //执行查询
            List<Course> courseList = qr.query (sb.toString (), new BeanListHandler<Course> (Course.class), list.toArray ());//集合转换为数组
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace ();
            return null;
        }

    }

    //保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {

        try {
            //1.创建QueryRunner对象
            QueryRunner qr = new QueryRunner (DruidUtils.getDataSource ());

            //编写sql
            String sql = "INSERT INTO course (\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS,\n" +
                    "create_time,\n" +
                    "update_time\n" +
                    ")VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
            //准备参数
            Object[] param = {course.getCourse_name (),course.getBrief (),course.getTeacher_name (),course.getTeacher_info (),
            course.getPreview_first_field (),course.getPreview_second_field (),course.getDiscounts (),course.getPrice (),
            course.getPrice_tag (),course.getShare_image_title (),course.getShare_title (),course.getShare_description (),
            course.getCourse_description (),course.getCourse_img_url (),course.getStatus (),course.getCreate_time (),course.getUpdate_time ()};

            //执行插入操作
            int row = qr.update (sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace ();
        }
        return 0;
    }

    //根据id查询课程信息
    @Override
    public Course findCourseById(int id) {

        try {
            QueryRunner qr = new QueryRunner (DruidUtils.getDataSource ());

            String sql = "SELECT\n" +
                    "id,\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS\n" +
                    "FROM course WHERE id = ?";

            Course query = qr.query (sql, new BeanHandler<Course> (Course.class), id);
            return query;
        } catch (SQLException e) {
            e.printStackTrace ();
        }
        return null;
    }

    //修改课程营销信息
    @Override
    public int updateCourseSaleInfo(Course course) {

        try {
            QueryRunner qr = new QueryRunner (DruidUtils.getDataSource ());

            String sql = "UPDATE course SET\n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "STATUS = ?,\n" +
                    "update_time = ?\n" +
                    "WHERE id = ?";
            Object[] param = {course.getCourse_name (),course.getBrief (),course.getTeacher_name (),course.getTeacher_info (),
            course.getPreview_first_field (),course.getPreview_second_field (),course.getDiscounts (),course.getPrice (),course.getPrice_tag (),
            course.getShare_image_title (),course.getShare_title (),course.getShare_description (),course.getCourse_description (),
            course.getCourse_img_url (),course.getStatus (),course.getUpdate_time (),course.getId ()};
            int i = qr.update (sql, param);
            return i;
        } catch (SQLException e) {
            e.printStackTrace ();
        }
        return 0;
    }

    //修改课程状态
    @Override
    public int updateCourseStatus(Course course) {

        try {
            QueryRunner qr = new QueryRunner (DruidUtils.getDataSource ());

            String sql = "UPDATE course SET STATUS = ?,update_time =? WHERE id = ?";

            Object[] param = {course.getStatus (),course.getUpdate_time (),course.getId ()};

            int row = qr.update (sql, param);

            return row;
        } catch (SQLException e) {
            e.printStackTrace ();
        }
        return 0;
    }
}
